Unable to print when using Adobe Embed API in Firefox

I am using Adboe Embed API to display PDFs. I works fine in all browsers, except that when using Firefox, the print function does not work. Strangely, if I load a sample Adobe file (eg. https://documentservices.adobe.com/view-sdk-demo/PDFs/Bodea%20Brochure.pdf) it prints OK. But if I use a URL for one of my own files, all that happens when I try to print in Firefox is that the PDF is dimmed for a few seconds - but no print dialogue appears.  According to the release notes, a fix for Firefox printing was released on 27 June 2024. But I am still having problems. In all browsers except Firefox the print function works fine. Can anyone help please?